java - Scaling graphics causes game to stop rendering -

i'm making (currently rather simple) top-down 2d game in java, , having trouble implementing zooming.

it seems way can scale reducing width , height, , feeding multiplied-up version setpreferredsize(). i'd instead use affinetransform scale graphics2d @ render time, including g2d.settransform(transformer); line gives being rendered null tile.

without: with:

i tried feeding class handles tile/sprite rendering multiplied-up/divided down values width , height, exact same result. ideas?

here's render method:

    bs = getbufferstrategy();     if (bs == null) {         createbufferstrategy(3); // woo, triple buffering!         return;     }      transformer.scale(scale, scale);      // other stuff here . . .       // draw screen.pixels pixels     (int = 0; < pixels.length; i++) {         pixels[i] = screen.pixels[i];     }      // draw     g2d = (graphics2d)bs.getdrawgraphics();     g2d.settransform(transformer);     {         g2d.drawimage(image, 0, 0, width, height, null);         /* g.setcolor(color.white);          * g.setfont(new font("veranda", 0, 50));          * g.drawstring("b: " + mouse.b(), 80, 80);         */     }     g2d.dispose();      bs.show(); // blit/show buffer      toolkit.getdefaulttoolkit().sync(); 

i'm using eclipse ide , no premade game engines on java1.6. i'm rendering onto canvas in jframe.

i take @ slick2d http://www.slick2d.org/

it has own image class, , way handles re-sizing images easy work with.